| Budget Amount *help |
¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000)
Fiscal Year 2016: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2014: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2013: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
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| Outline of Final Research Achievements |
History of landform development in the Northeast Japan Arc have been not well constructed by scarcity of chronological data for underground geology in tectonically subsiding areas such as inland basins and coastal plain. This study clarified the relationships between underground geology of inland basins (Koriyama, Aizu, Yonezawa and Yamagata) and subsurface sediments surrounding these basins using tephrochronology. Firstly, stratigraphical data and characteristic properties of Early to Middle Pleistocene tephras originated from the Northeast Japan Arc, including the Shirakawa Ignimbrites and tephras derived from Numasawa and Sunagoahra Calderas, have been prepared. Subsequently, we detected these tephras in underground basin sediments together with other widespread tephras, then constructed the histories for the formation of basin-fill sediments and landform.
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